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Thank you Karl, Peter and Bohdan.
Karl - I use the STC Duo dual band filter.
Bohdan - In the debeyering settings there’s options to extract Ha and O3 from your lights. There’s guides to do it on YouTube. Then I create a new image in photoshop. I copy my individual stacks ( Ha and O3 ) then paste them onto the RGB layers in the new image. Ha to the red channel then 03 to both the green and blue channels. Then I colour balance the background in the combined image and carry out my normal processing. You can sharpen etc the individual channels before you combine them too to help correct bloating on certain channels etc. Its quite a flexible way to process.
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